The patch titled spi_mpc83xx: add small delay after asserting chip-select line has been added to the -mm tree. Its filename is spi_mpc83xx-add-small-delay-after-asserting-chip-select-line.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find out what to do about this The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ Subject: spi_mpc83xx: add small delay after asserting chip-select line From: Anton Vorontsov <avorontsov@xxxxxxxxxxxxx> This is needed for some underlaying GPIO controllers that may be a bit slow, or if chip-select signal need some time to stabilize. For what it's worth, we already have the similar delay for chip-select de-assertion case. Signed-off-by: Anton Vorontsov <avorontsov@xxxxxxxxxxxxx> Cc: Kumar Gala <galak@xxxxxxxxxxxxxxxxx> Cc: David Brownell <david-b@xxxxxxxxxxx> Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- drivers/spi/spi_mpc83xx.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff -puN drivers/spi/spi_mpc83xx.c~spi_mpc83xx-add-small-delay-after-asserting-chip-select-line drivers/spi/spi_mpc83xx.c --- a/drivers/spi/spi_mpc83xx.c~spi_mpc83xx-add-small-delay-after-asserting-chip-select-line +++ a/drivers/spi/spi_mpc83xx.c @@ -383,8 +383,10 @@ static void mpc83xx_spi_work(struct work break; } - if (cs_change) + if (cs_change) { mpc83xx_spi_chipselect(spi, BITBANG_CS_ACTIVE); + ndelay(nsecs); + } cs_change = t->cs_change; if (t->len) status = mpc83xx_spi_bufs(spi, t); _ Patches currently in -mm which might be from avorontsov@xxxxxxxxxxxxx are linux-next.patch mpc52xx_psc_spi-convert-to-cs_control-callback.patch spi_mpc83xx-handle-other-freescale-processors.patch spi_mpc83xx-quieten-down-the-requested-speed-is-too-low-message.patch spi_mpc83xx-add-small-delay-after-asserting-chip-select-line.patch powerpc-86xx-add-mmc-spi-support-for-mpc8610hpcd-boards.patch spi_mpc83xx-fix-checkpatch-issues.patch spi_mpc83xx-split-mpc83xx_spi_work-into-two-routines.patch spi_mpc83xx-remove-dead-code.patch spi_mpc83xx-rename-spi_83xxc-to-spi_8xxxc.patch spi_mpc8xxx-s-83xx-8xxx-g.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html